I pulled off the retaining clip with pliers then removed the old knob and timer dial. I replaced all the parts with the new ones and used pliers to reinstall the clip. The teeth on the new knob engage to select the cycle.
https://www.youtube.com/watch?v=cQwLtRcHx9k

My problem was intermittent spark and then no spark. My first fix was to give my wife one of those long BBQ grill lighters but after about a week she told me to "FIX IT". After researching the problem on the internet I determined it was likely one of three things: IGNITERS (not likely), SWITCHES (possible), or SPARK MODULE (most likely). I ordered the Spark Module on Sunday night and it arrived on Tuesday. I was totally surprised by the speed of delivery. Took about 30 minutes to install and all was well in my home again.
Thanks AppliancePartsPros!